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E90/E91/E92/E93 (2006 - 2013) The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

so get the JEGS catalog, get to the oil section , short story I purchase some racing oil for my 1971 Triumph TR6- straight 6 engine, high lift cam, JE Pistons, Carillo Rods, roller rockers. bored to 2800 CC, 5 pounds taken off the Crank shaft, AL flywheel. 200HP 187Ft/lbs torque at 2500 rpm, (and for anyone that doesn't know, originally 95 HP and 125 foot pounds torque) Issue= modern oils dont have the ZZDP(zinc) and phosphorus in the percentages that they were back in the 80's which kills these engines, mainly the valve train... so the race oil has the correct amounts of ZZDP and phosphorus but its not Street legal. But like I care, seems the only reason they dropped the levels is because it reduces the efficiency of catalytic converts' So now the question, I wonder if the same race oil would hurt or help our BMW engines, with the catalytic converter taken out of the equation, same 5W30 syn, meets or exceeds BMW oil too

From what I understand, the ZDDP was really used for flat tappet protection, and it was sacrificial. I guess the question revolves around the areas where we see intense pressure within the engine. Perhaps the rod bearings can benefit, but I feel moly may be more beneficial there. It's worth running an interval and doing a UOA for results though.

you are correct, the ZZDP is for flat tappet protection and high pressure areas. I dont know the configuration of the cams in BMW engines, round lobes just offset or the geometry of older style cams D shaped type

you are correct, the ZZDP is for flat tappet protection and high pressure areas. I dont know the configuration of the cams in BMW engines, round lobes just offset or the geometry of older style cams D shaped type

Racing oil is a short term oil with a low TBN & generally because of its TBN it lacks sufficient detergent for street use. I don't understand why people don't believe what the people who designed & built the motor tell you what type of oil to use.

well I have not done anything yet, Plus the oil we purchase at BMW is not made by BMW, and there has to be better oils out there, I wonder if the oil the one guy was using that dropped a valve and destroyed his engine was BMW oil or another brand?

Racing oil is a short term oil with a low TBN & generally because of its TBN it lacks sufficient detergent for street use. I don't understand why people don't believe what the people who designed & built the motor tell you what type of oil to use.

Who are you supposed to believe, some engineers you don't know, never meet, and who probably don't even speak English good, or some good old internet fellows you can pal around with?